1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
/*
* BIRD -- OSPF
*
* (c) 2000 Ondrej Filip <feela@network.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include "ospf.h"
void
ospf_lsreq_tx(struct ospf_neighbor *n)
{
snode *sn;
struct top_hash_entry *en;
struct ospf_lsreq_packet *pk;
struct ospf_packet *op;
struct ospf_lsreq_header *lsh;
u16 length;
int i,j;
pk=(struct ospf_lsreq_packet *)n->ifa->ip_sk->tbuf;
op=(struct ospf_packet *)n->ifa->ip_sk->tbuf;
fill_ospf_pkt_hdr(n->ifa, pk, LSREQ);
s_init(&(n->lsrqi), &(n->lsrql));
sn=s_get(&(n->lsrqi));
if(sn==NULL) return;
/* FIXME above I don't need iterator and slist */
i=j=(n->ifa->iface->mtu-SIPH-sizeof(struct ospf_lsreq_packet))/
sizeof(struct ospf_lsreq_header); /* FIXME IP header! */
lsh=(struct ospf_lsreq_header *)(pk+1);
for(;i>0;i--)
{
en=(struct top_hash_entry *)sn;
lsh->padd1=0; lsh->padd2=0;
lsh->type=en->lsa.type;
lsh->rt=htonl(en->lsa.rt);
lsh->id=htonl(en->lsa.id);
lsh++;
DBG("Requesting %uth LSA: Type: %u, Id: %u, RT: %u\n",i, en->lsa.type,
en->lsa.id, en->lsa.rt);
if((sn=sn->next)==NULL) break;
}
length=sizeof(struct ospf_lsreq_packet)+(j-i)*sizeof(struct ospf_lsreq_header);
op->length=htons(length);
ospf_pkt_finalize(n->ifa, op);
sk_send_to(n->ifa->ip_sk,length, n->ip, OSPF_PROTO);
DBG("Lsreq send to: %u\n", n->rid);
}
void
lsrr_timer_hook(timer *timer)
{
struct ospf_iface *ifa;
struct proto *p;
struct ospf_neighbor *n;
n=(struct ospf_neighbor *)timer->data;
ifa=n->ifa;
p=(struct proto *)(ifa->proto);
debug("%s: LSRR timer fired on interface %s for neigh: %u.\n",
p->name, ifa->iface->name, n->rid);
ospf_lsreq_tx(n);
}
void
ospf_lsreq_rx(struct ospf_lsreq_packet *ps, struct proto *p,
struct ospf_iface *ifa, u16 size)
{
u32 nrid, myrid;
struct ospf_neighbor *n;
struct ospf_lsreq_header *lsh;
int length;
u8 i;
nrid=ntohl(ps->ospf_packet.routerid);
myrid=p->cf->global->router_id;
if((n=find_neigh(ifa, nrid))==NULL)
{
debug("%s: Received dbdes from unknown neigbor! (%u)\n", p->name,
nrid);
return ;
}
if(n->state<NEIGHBOR_EXCHANGE) debug("%s: Ignoring it.\n", p->name);
length=htons(ps->ospf_packet.length);
lsh=(void *)(ps+1);
for(i=0;i<(length-sizeof(struct ospf_lsreq_packet))/
sizeof(struct ospf_lsreq_header);i++);
{
DBG("Processing LSA: ID=%u, Type=%u, Router=%u\n", lsh->id, lsh->type,
lsh->rt);
/* FIXME Go on */
}
}
|
